Chance for rain ramps up in metro Phoenix as monsoon season winds down

PHOENIX – The 2025 monsoon season could go out with a bang in metro Phoenix, with storm activity expected to ramp up in the coming days.

Thursday is on track to be Phoenix’s third consecutive day with triple-digit temperatures, with a forecast high of around 105. However, there’s also a 10% chance for showers to develop in the afternoon.

The possibility for rain will increase overnight and remain at 30% or higher for much of September’s final weekend. The chance for storms will peak during the day on Friday at around 70% before tapering off.

“We drop down and dry out and see pretty much next to no chances starting Monday,” Alicia Ryan of the National Weather Service (NWS) in Phoenix told KTAR News 92.3 FM on Thursday morning.

What does Phoenix weather forecast say about temperatures?

Temperatures will drop as the storm activity increases, with highs projected in the lower 90s from Friday into early next week.

“As of right now, 90 is the lowest, but we’ll see if we have the potential for even lower in the coming days,” Ryan said.

When does Arizona monsoon season end?

Tuesday is the final day of monsoon season, which runs annually from June 15 to Sept. 30.

Phoenix Sky Harbor International Airport, which the NWS uses for the city’s official readings, started Thursday with a seasonal rainfall total of 0.91 inches.

That’s currently 14th on the list of driest monsoon seasons on record.

Phoenix normally gets about 2.4 inches of rain during the monsoon season.

KTAR News 92.3 FM’s Ginia McFarland contributed to this report.

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